So we've been playing with the Snow Leopard for awhile but didn't know how to use old Quicktime 7 - Snow Leopard comes with Quicktime 10 by default.  Turns out, it's pretty easy.  Just open a Quartz compozer file from your computer with Quicktime and it will prompt you to update.  To find a .qtz file simply do a Spotlight search.

Here's a video of the process from ijustapple. Turn off the sound on your computer before hitting play...unless you happen to be DJing at a 1990's club.

Quicktime 7 gets put in your Applications/Utilites folder.